using UnityEngine;

public class Car : MonoBehaviour
{
  public Rigidbody rb;
  public Transform tr;
  private Vector3 inp = Vector3.zero;
  private Vector3 vel = Vector3.zero;
  public float speed;
  public int RotateSpeed;
  public float velspeed;
  public float speed2;
   
  // Use this for initialization
  void Start ()
  {
   rb = rigidbody;
   tr = transform;
  }
   
  // Update is called once per frame
  void Update ()
  {

   speed2 = -vel.z;

   if (Input.GetButton("Horizontal")){
    speed = 4;
    //velspeed = 0.70f;
   }
   else {
    speed = 6;
    //velspeed = 0.95f;

   }
   if (Input.GetKey(KeyCode.W)){
   inp.x = Input.GetKey(KeyCode.A) ? -45f : 0f + (Input.GetKey(KeyCode.D) ? 45f : 0f);
   inp.y = 0f;
    
   }

   if (Input.GetKey(KeyCode.S)){
    inp.x = Input.GetKey(KeyCode.A) ? 45f : 0f + (Input.GetKey(KeyCode.D) ? -45f : 0f);
    inp.y = 0f;
    
   }

   if (Input.GetKey(KeyCode.Space)){
    rigidbody.drag += 0.7f;
    RotateSpeed = 0;
   }
   else {
    rigidbody.drag = 1;
    RotateSpeed = 3;
   }

  inp.z=Input.GetKey(KeyCode.S)?10f:0f+(Input.GetKey(KeyCode.W)?-10f:0f);
  }
   
  void FixedUpdate()
  {    
   if (Input.GetButton ("Vertical")){
    tr.rotation *= Quaternion.Euler(0f, inp.x * Time.deltaTime * RotateSpeed, 0f);
   }

   vel = tr.InverseTransformDirection (rigidbody.velocity);
    
   if (vel.sqrMagnitude > 0.001f)
    vel = Quaternion.Inverse(Quaternion.LookRotation(vel))*vel*Mathf.Sign(vel.z) * velspeed;
    
   rb.velocity = tr.TransformDirection (vel + (new Vector3(0f, inp.y * Time.deltaTime * speed, inp.z * Time.deltaTime * speed)));
  }
}